I had heard of Harriman and Murrow, of course, but amazingly had never heard of Winant, who was the book's most compelling personality, as well as being perhaps the key American in London both before and during the war. Shy, idealistic, incredibly admirable, his story was fascinating, sad, and deeply moving.
I enjoyed the book, and learned a great deal (let's hope some of it gets retained!) but it wasn't a book I ran to pick up when I had some reading time. I think Olson is an excellent writer, so I don't blame her. I think it's just my fiction predilection (love the rhyme).